Most Important MCQs of SCIENCE PART I for SSC Board Examination

Select the correct option and write only the alphabet corresponding to the correct option :

Water expands on reducing its temperature below …………. °C.

(A) 0              (B) 4             (C) 8           (D) 12

Select the correct option and write only the alphabet corresponding to the correct option :

If a ray of light passes from a denser medium to a rarer medium in a straight line, the angle of incidence must be …………..

(A) 0°
(B) 30°
(C) 60
(D) 90°

Select the correct option and write only the alphabet corresponding to the correct option :

What will be the weight of a person on the earth, who weighs 9 N on the moon?

(A) 3N              (B) 15N             (C) 45 N              (D) 54N

Select the correct option and write only the alphabet corresponding to the correct option :

Which of the statements given below correctly describes the magnetic field near a long, straight current carrying conductor ?

(A)The magnetic lines of force are in a plane, perpendicular to the conductor in the form of straight .
(B) The magnetic lines of force are parallel to the conductor on all the sides of conductor.
(C) The magnetic lines of force are perpendicular to the conductor going radially outward.
(D) The magnetic lines of force are in concentric circles with the wire as the centre, in a plane perpendicular to the conductor.

Select the correct option and write only the alphabet corresponding to the correct option :

When a ray of light travels from air to glass slab and strikes the surface of separation at 90°, then it ………….

(A) bends towards the normal
(B) bends away from the normal
(C) passes unbent
(D) passes in zigzag way

Select the correct option and write only the alphabet corresponding to the correct option :

In a double displacement reaction ……….

(A) ions remain at rest           (B) ions get liberated         

(C) ions are exchanged           (D) ions are not created

Select the correct option and write only the alphabet corresponding to the correct option :

The device used for measuring a current is called ……….

(A) a voltmeter                  (B) an ammeter         

(C) a galvanometer           (D) a generator

Select the correct option and write only the alphabet corresponding to the correct option :

Out of the following ………….. has the highest absolute refractive index.

(A)fused quartz
(B) diamond
(C) crown glass
(D) ruby

Select the correct option and write only the alphabet corresponding to the correct option :

Electromagnetic induction means ……….

(A) charging of an electric conductor
(B) production of magnetic field due to a current flowing through a coil
(C) generation of a current in a coil due to relative motion between the coil and the magnet
(D) motion of the coil around the axle in an electric motor

Select the correct option and write only the alphabet corresponding to the correct option :

The specific latent heat of fusion of ice is ………..

(A) 540 cal/g           (B) 80 cal/g

(C) 800 cal/g             (D) 54 cal/g